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Author Topic: Coil Pack  (Read 2079 times)

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mrjimbo

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Coil Pack
« on: 24 November 2012, 10:08:05 »

What are the symptoms of imminent coil pack failure ?

3.0 v6 Starts perfect everytime but when the engine has warmed up, usually after 2-3miles developes a miss. I can stop the engine and restart it and it's still missing. Turn engine of and start it from cold the miss has disappeared but as engine warms up the miss returns.
Checked the codes and only 12 + 31 so all is well there.

Any ideas ?
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Lizzie_Zoom

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Re: Coil Pack
« Reply #1 on: 24 November 2012, 10:35:32 »

Going on my recent troubles sorting a similar problem, I recommend you check all spark plug leads, check individual cylinder firing by lifting each lead from it's plug whilst the engine is running. If no improvement then check for an air leak around the plenum and breather plastic boxes on top (especially if you have cleaned them recently) and check all rubber 'O' rings, INCLUDING the one underneath those boxes, between them and the plenum.

After that then consider replacing the DIS pack.

If you are interested in my experiences, read these threads.................

http://www.omegaowners.com/forum/index.php?topic=109186.0

http://www.omegaowners.com/forum/index.php?topic=109548.0

http://www.omegaowners.com/forum/index.php?topic=109299.0

http://www.omegaowners.com/forum/index.php?topic=109316.0

http://www.omegaowners.com/forum/index.php?topic=109495.0


Hope this helps! :y :y
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feeutfo

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Re: Coil Pack
« Reply #2 on: 24 November 2012, 12:24:31 »

Could be any part of the ignition system. Oil in plug wells? Water on the dis PAC, from the scuttle or a leaking hbv is not uncommon for example.

As the coil PAC is a mare to get at, comparively speaking, and given likelyhood of oil in plug wells from failed cam cover gaskets and blocked breathers, a normall course of action would be to check/change the plugs. In doing so, any oil or damaged plug leads at the plug end will hopefully be obvious.

If no problems found and symptoms persist, then look at dis PAC, and possibly new leads while your there...?

Dis PAC tends to fail in pairs of cylinders, as it shares its three iron coors over 6 cylinders. So if one iron coor goes down, you can get one cylinder on each bank missing, this still gives a balanced engine and the car sounds like a scooby flat four.

Where as a misfire on , say, one cylinder, or two cylinders on the same bank, is far more noticeable as the the engine is unbalanced and can give quite bad vibration, and IME tends to be far more pronounced.
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feeutfo

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Re: Coil Pack
« Reply #3 on: 24 November 2012, 12:25:25 »

On the older engines, miss fires do not give an engine fault code.
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mrjimbo

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Re: Coil Pack
« Reply #4 on: 24 November 2012, 12:40:29 »

Cheers Lizzie  :y I looked at all those links, glad to see you have yours all sorted now.
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mrjimbo

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Re: Coil Pack
« Reply #5 on: 24 November 2012, 12:45:18 »

 Hi Chris, Yes it definately sounds like a Scoobie  ;D so i tend to think it's more likely to be Dis pack coupled with the fact it only starts to miss when it warms up possibly a HT lead fault but unlikely to have 2 leads fail at same time.
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feeutfo

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Re: Coil Pack
« Reply #6 on: 24 November 2012, 12:46:52 »

Hi Chris, Yes it definately sounds like a Scoobie  ;D so i tend to think it's more likely to be Dis pack coupled with the fact it only starts to miss when it warms up possibly a HT lead fault but unlikely to have 2 leads fail at same time.
:y
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mrjimbo

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Re: Coil Pack
« Reply #7 on: 24 November 2012, 13:00:30 »

I've got a good Dis pack here so might as well change the leads at same time, any recomendations other than OE ?
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feeutfo

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Re: Coil Pack
« Reply #8 on: 24 November 2012, 13:06:43 »

If cost is important, Euro car part do a set for £40 odd iirc. The lead lengths are as close to being correct as I've seen on non oe leads. Durability? Don't know yet.

Fitted a couple of sets to members cars about a year ago.
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Lizzie_Zoom

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Re: Coil Pack
« Reply #9 on: 24 November 2012, 13:12:20 »

Cheers Lizzie  :y I looked at all those links, glad to see you have yours all sorted now.

Thanks :y :y

I certainly think Chris's advice is very good as well. :y :y

I definitely had at least two cylinders misfiring, so the DIS pack is a prime suspect and I am glad that I changed it.  If you look at my pictures it was definitely on the way out ::) ::) ;)
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mrjimbo

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Re: Coil Pack
« Reply #10 on: 24 November 2012, 13:12:55 »

Cost wise i think the OE ones are well overpriced £140 a set iirc  :o
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Lizzie_Zoom

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Re: Coil Pack
« Reply #11 on: 24 November 2012, 13:16:56 »

Cost wise i think the OE ones are well overpriced £140 a set iirc  :o

Try Vx and it is £123 Trade for ONE bank!! :o :o

Hence why I got a great full Omega set from the local Vx breakers for £20; DIS Pack £25. :y
« Last Edit: 24 November 2012, 13:19:03 by Lizzie Zoom »
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mrjimbo

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Re: Coil Pack
« Reply #12 on: 24 November 2012, 13:31:25 »

Didn't realise they were that expensive Lizzie
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RobG

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Re: Coil Pack
« Reply #13 on: 24 November 2012, 14:08:31 »

Leads from here http://www.eurocarparts.com/  put 409725370 in search box
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mrjimbo

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Re: Coil Pack
« Reply #14 on: 24 November 2012, 14:14:33 »

Cheers RobG  :y  now all i want is some dry weather  :(
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